feat: subscriptions

app/Services/StripeCreditProductSyncer.php

@@ -2,7 +2,7 @@
 
 namespace App\Services;
 
-use App\Enums\CreditProductType;
+use App\Enums\BillingProductPurpose;
 use App\Models\CreditProduct;
 use Laravel\Cashier\Cashier;
 
@@ -10,6 +10,12 @@ class StripeCreditProductSyncer
 {
     public function sync(CreditProduct $product): CreditProduct
     {
+        throw_if(
+            $product->purpose === null,
+            \InvalidArgumentException::class,
+            'A billing product purpose is required before syncing with Stripe.',
+        );
+
         $stripe = Cashier::stripe();
         $stripeProductId = $product->stripe_product_id;
 
@@ -19,8 +25,7 @@ class StripeCreditProductSyncer
                 'description' => $product->description,
                 'metadata' => [
                     'credit_product_id' => $product->getKey(),
-                    'credits' => (string) $product->credits,
-                    'type' => $product->type->value,
+                    'billing_product_purpose' => $product->purpose?->value,
                 ],
             ]);
 
@@ -32,8 +37,7 @@ class StripeCreditProductSyncer
                 'active' => (bool) $product->is_active,
                 'metadata' => [
                     'credit_product_id' => $product->getKey(),
-                    'credits' => (string) $product->credits,
-                    'type' => $product->type->value,
+                    'billing_product_purpose' => $product->purpose?->value,
                 ],
             ]);
         }
@@ -42,7 +46,7 @@ class StripeCreditProductSyncer
 
         if (! $product->stripe_price_id) {
             $needsNewPrice = true;
-        } elseif ($product->wasChanged(['amount', 'currency', 'type', 'credits'])) {
+        } elseif ($product->wasChanged(['amount', 'currency', 'purpose'])) {
             $needsNewPrice = true;
         }
 
@@ -55,12 +59,11 @@ class StripeCreditProductSyncer
                 'currency' => strtolower($product->currency),
                 'metadata' => [
                     'credit_product_id' => $product->getKey(),
-                    'credits' => (string) $product->credits,
-                    'type' => $product->type->value,
+                    'billing_product_purpose' => $product->purpose?->value,
                 ],
             ];
 
-            if ($product->type === CreditProductType::MONTHLY) {
+            if ($product->purpose === BillingProductPurpose::SUBSCRIPTION) {
                 $priceData['recurring'] = [
                     'interval' => 'month',
                 ];